Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: French
Origin: isotherme, from Greek iso- ( ISO-) + therme 'heat'

isotherm

 noun
     
Related topics: Meteorology
i‧so‧therm [countable] technical
HEM a line on a weather map joining places where the temperature is the same
Definition from the Longman Dictionary of Contemporary English
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